From d537d352683799beea94c0698d85bcfa7f6f4ece Mon Sep 17 00:00:00 2001
From: David CARLIER <devnexen@gmail.com>
Date: Thu, 19 Sep 2024 16:54:56 +0100
Subject: [PATCH] export snmalloc::alloc_size to rust wrappers. (#676)

---
 src/snmalloc/override/rust.cc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/snmalloc/override/rust.cc b/src/snmalloc/override/rust.cc
index 4d7e79a..4a5dcda 100644
--- a/src/snmalloc/override/rust.cc
+++ b/src/snmalloc/override/rust.cc
@@ -50,4 +50,10 @@ extern "C" SNMALLOC_EXPORT void SNMALLOC_NAME_MANGLE(rust_statistics)(
 {
   *current_memory_usage = Alloc::Config::Backend::get_current_usage();
   *peak_memory_usage = Alloc::Config::Backend::get_peak_usage();
-}
\ No newline at end of file
+}
+
+extern "C" SNMALLOC_EXPORT size_t
+SNMALLOC_NAME_MANGLE(rust_usable_size)(const void* ptr)
+{
+  return ThreadAlloc::get().alloc_size(ptr);
+}